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[Music]

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500 32 nanometers

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that's the wavelength of a

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bright green color the color of the laser from the

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atlas instrument that measures the elevation

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of the earth under it when it receives them

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the photons coming from the earth

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have to filter the sunlight that  it is

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reflected from the planet as it could

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overwhelm the detectors so you are

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just getting in the light waves that

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measure exactly 500 32 nanometers in

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that wavelength range

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sunlight also activates the

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bile detectors so programs are needed

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computer systems to filter